Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
Yes. Those are excellent gifts. Who else do you need to buy for?
当然，这是都是最佳礼物。你还需要买给谁？
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
But I couldn't answer the rest.They were too difficult for me.
但我回答不出其作的题。那些题对我来说太难了。